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Synthesis of micro/nano-structured Mn3O4 for supercapacitor electrode with excellent rate performance

机译:具有优异速率性能的超级电容器微/纳米结构MN3O4的合成

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摘要

Micro/nano-structured Mn3O4 with an open three-dimensional flower-like morphology were fabricated by a facile solvothermal approach using hexadecyltrimethylammonium bromide as a surfactant and CH3CH2OH as a solvent. The Mn3O4 microspheres were self-assembled by one-dimensional nanowires; in addition, a dandelion-structure formation mechanism of the Mn3O4 microspheres is discussed. The Mn3O4 microspheres used as a supercapacitor electrode in 1 mol L-1 Na2SO4 electrolyte have a specific capacitance value of 286 F g(-1) at a low current density of 0.5 A g(-1), and can still retain 80% (230 F g(-1)) and 73% specific capacitance (210 F g(-1)) when the current densities are increased ten-fold (5 A g(-1)) and twenty-fold (10 A g(-1)), respectively. In addition, the capacitance retention is 90% after 1000 cycles at a current density of 5 A g(-1). In comparison with Mn3O4 synthesized in N, N-dimethylformamide solvent at 0.5 A g(-1) and 5 A g(-1), the specific capacitance obtained increased by 18.7% and 17.4%, respectively.
机译:微/纳米结构MN3O4具有开放的三维花样形态,通过使用十六烷基三甲基溴化铵作为表面活性剂和CH 3 CH 2 OH作为溶剂来制造具有型溶液的溶剂热方法。 MN3O4微球通过一维纳米线自组装;另外,讨论了Mn3O4微球的蒲公英结构形成机制。用作1mol L-1 Na 2 SO 4电解质中的超级电容器电极的Mn3O4微球的特定电容值为286f g(-1)的低电流密度为0.5 a g(-1),并且仍然可以保留80%(当电流密度增加10倍(5Ag(-1))和二十倍时(10 a g( - )时,230 f g(-1))和73%的特定电容(210 f g(-1))(210 f g(-1))(10 a g( - 1))分别。另外,在电流密度为5Ag(-1)的1000次循环后,电容保持是90%。与在N,N-二甲基甲酰胺溶剂中合成的Mn 3 O 4相比,在0.5Ag(-1)和5Ag(-1)中,所获得的比电容分别增加18.7%和17.4%。

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  • 来源
    《RSC Advances》 |2015年第40期|共5页
  • 作者单位

    Yanshan Univ Coll Environm &

    Chem Engn Qinhuangdao 066004 Peoples R China;

    Yanshan Univ Coll Environm &

    Chem Engn Qinhuangdao 066004 Peoples R China;

    Yanshan Univ Coll Environm &

    Chem Engn Qinhuangdao 066004 Peoples R China;

    Yanshan Univ Coll Environm &

    Chem Engn Qinhuangdao 066004 Peoples R China;

    Yanshan Univ Coll Environm &

    Chem Engn Qinhuangdao 066004 Peoples R China;

    Xian Univ Technol Sch Mat Sci &

    Engn Xian 710048 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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